Large-span roof truss accumulation slippage single frame truss arch camber control and dismounting method
A large-span, cumulative slip technology, applied to truss-type structures, girders, truss beams, etc., can solve the problems of arching control, slow oil return, incapable of precise control, jacking up, etc., to achieve small deviation and easy The effect of high operation and control precision
Active Publication Date: 2017-07-04
CHINA MCC17 GRP
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Problems solved by technology
For the installation of large-span box-assembled trusses, there is a problem of choosing the method of arching and unloading. Usually, the arching and unloading of this truss assembly uses hydraulic jacks to control the arching of the butt joints. After the assembly is completed, the hydraulic jack releases pressure to achieve unloading. Purpose, this method cannot achieve accurate control of the arching control and the slow oil return during the unloading process. The other is the sandbox unloading method. This method can control the unloading and use a large overall structure, but it cannot be jacked up
Method used
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Embodiment 1
[0038] Such as Figure 1-8 As shown, a long-span roof truss cumulative slip single truss arching control and unloading method, including the following steps:
[0039] Step 1: Determining the segmental point of the single truss. This step is to determine the arching point according to the arching requirements of the single truss. Number the individual components to provide an assembly sequence for the subsequent assembly of single-piece components into a single truss as a whole, and at the same time, the position of the segment point also provides a reference position for the installation of subsequent arching control and unloading devices;
[0040] Step 2: Fabrication of the arching control and unloading device. This step is aimed at the control of the arching of the single truss during the assembly process, and the manufacture of special devices used for unloading the single truss after the assembly is completed and before the cumulative slippage. The arching The control and...
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The invention discloses a large-span roof truss accumulation slippage single frame truss arch camber control and dismounting method, comprising steps of determining single frame truss segment points, manufacturing an arch camber and dismounting device, determining an installation position of the arch camber and dismounting device, determining a central line of the segmented single frame truss, installing the arch camber and dismounting device, installing the segmented single frame trusses and performing arch camber control, retesting arch camber degree, and dismounting after assembly and welding are completed. Using the method can perform arch camber control in an assembly process of the large-span single frame truss and control dismounting after the single frame truss is completed. The method is simple in operation, high in control precision, and low in deviation, and has very high economical benefits.
Description
technical field [0001] The invention relates to a truss arching control and unloading method, in particular to a large-span roof truss accumulative slip single-truss arching and unloading method. Background technique [0002] At present, with the development of society, all kinds of public buildings emerge as the times require, and at the same time, the building functions are gradually improved to meet the requirements of architectural aesthetics and safety. The large-span truss structure assembled by the box body can meet the current architectural needs. For the installation of large-span box-assembled trusses, there is a problem of choosing the method of arching and unloading. Usually, the arching and unloading of this truss assembly uses hydraulic jacks to control the arching of the butt joints. After the assembly is completed, the hydraulic jack releases pressure to achieve unloading. Purpose, this method cannot achieve accurate control of the arching control and the sl...
Claims
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IPC IPC(8): E04G21/00E04C3/02
CPCE04C3/02E04G21/00
Inventor 戚二舟任智程声祥张新
Owner CHINA MCC17 GRP